Track-and-hold circuit utilizing a negative of the input signal

Details Track-and-hold circuit utilizing a negative of the input signal Track-and-hold circuit utilizing a negative of the input signal

1995-08-08

1997-11-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 96, G11C 2702

Patent

active

056892012

ABSTRACT:
A track-and-hold circuit that utilizes the negative of the input signal to improve tracking of the input signal during the track mode. By applying the negative of the input signal to an amplifier node to which the output signal is coupled, the output signal is forced to track the input signal in magnitude and polarity. Single-ended and fully differential embodiments of the circuit are disclosed, as well as embodiments using an operational amplifier and a cascode inverter amplifier. An improved switching scheme reduces delay in the transition from the hold mode to the track mode. A sample-and-hold circuit may be constructed from a pair of the track-and-hold circuits.

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